Question

You forget a toast in toaster and it turns black. Can this change be reversed?

Answer 1

Answer:

A toast kept in a toaster becomes black. This is an irreversible change.

Explanation:

Any change that cannot be reversed is called an irreversible change and it is a permanent change.  

If we leave bread in a toaster for long, it gets burnt. It changes physically from soft to hard, white to black but we cannot get the same soft bread back.  

The burnt black dust of bread is the carbon deposits which has burnt in the long heating process.

Answer 2

Answer:

A toast kept in a toaster becomes black. This is an irreversible change.

Explanation:

Any change that cannot be reversed is called an irreversible change and it is a permanent change.  

If we leave bread in a toaster for long, it gets burnt. It changes physically from soft to hard, white to black but we cannot get the same soft bread back.  

The burnt black dust of bread is the carbon deposits which has burnt in the long heating process.